1  /* Stub for symlink().
       2     Copyright (C) 2009-2021 Free Software Foundation, Inc.
       3  
       4     This program is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation; either version 3 of the License, or
       7     (at your option) any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  #include <config.h>
      18  
      19  /* Specification.  */
      20  #include <unistd.h>
      21  
      22  #include <errno.h>
      23  #include <string.h>
      24  #include <sys/stat.h>
      25  
      26  
      27  #if HAVE_SYMLINK
      28  
      29  # undef symlink
      30  
      31  /* Create a symlink, but reject trailing slash.  */
      32  int
      33  rpl_symlink (char const *contents, char const *name)
      34  {
      35    size_t len = strlen (name);
      36    if (len && name[len - 1] == '/')
      37      {
      38        struct stat st;
      39        if (lstat (name, &st) == 0 || errno == EOVERFLOW)
      40          errno = EEXIST;
      41        return -1;
      42      }
      43    return symlink (contents, name);
      44  }
      45  
      46  #else /* !HAVE_SYMLINK */
      47  
      48  /* The system does not support symlinks.  */
      49  int
      50  symlink (char const *contents _GL_UNUSED,
      51           char const *name _GL_UNUSED)
      52  {
      53    errno = ENOSYS;
      54    return -1;
      55  }
      56  
      57  #endif /* !HAVE_SYMLINK */